| /* |
| * OpenRISC Programmable Interrupt Controller support. |
| * |
| * Copyright (c) 2011-2012 Jia Liu <proljc@gmail.com> |
| * Feng Gao <gf91597@gmail.com> |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with this library; if not, see <http://www.gnu.org/licenses/>. |
| */ |
| |
| #include "hw/hw.h" |
| #include "cpu.h" |
| |
| /* OpenRISC pic handler */ |
| static void openrisc_pic_cpu_handler(void *opaque, int irq, int level) |
| { |
| OpenRISCCPU *cpu = (OpenRISCCPU *)opaque; |
| CPUState *cs = CPU(cpu); |
| int i; |
| uint32_t irq_bit = 1 << irq; |
| |
| if (irq > 31 || irq < 0) { |
| return; |
| } |
| |
| if (level) { |
| cpu->env.picsr |= irq_bit; |
| } else { |
| cpu->env.picsr &= ~irq_bit; |
| } |
| |
| for (i = 0; i < 32; i++) { |
| if ((cpu->env.picsr && (1 << i)) && (cpu->env.picmr && (1 << i))) { |
| cpu_interrupt(cs, CPU_INTERRUPT_HARD); |
| } else { |
| cpu_reset_interrupt(cs, CPU_INTERRUPT_HARD); |
| cpu->env.picsr &= ~(1 << i); |
| } |
| } |
| } |
| |
| void cpu_openrisc_pic_init(OpenRISCCPU *cpu) |
| { |
| int i; |
| qemu_irq *qi; |
| qi = qemu_allocate_irqs(openrisc_pic_cpu_handler, cpu, NR_IRQS); |
| |
| for (i = 0; i < NR_IRQS; i++) { |
| cpu->env.irq[i] = qi[i]; |
| } |
| } |